24 February 2004 The thin, dark, angular mesas in depressions in this Mars Global Surveyor (MGS) Mars Orbiter Camera (MOC) image are remnants of a layer of material that has been largely stripped away from the region. The picture is located in the south polar region near 78.1S, 272.2W. Sunlight illuminates the scene from the upper left; the picture covers an area 3 km (1.9 mi) wide.